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        <h1 class="title">SpringBoot中Shiro集成EhCache</h1>
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            <ol class="post-toc"><li class="post-toc-item post-toc-level-2"><a class="post-toc-link" href="#学习笔记-SpringBoot项目中Shiro集成EhCache"><span class="post-toc-number">1.</span> <span class="post-toc-text">学习笔记 : SpringBoot项目中Shiro集成EhCache</span></a><ol class="post-toc-child"><li class="post-toc-item post-toc-level-3"><a class="post-toc-link" href="#添加依赖"><span class="post-toc-number">1.1.</span> <span class="post-toc-text">添加依赖</span></a></li><li class="post-toc-item post-toc-level-3"><a class="post-toc-link" href="#创建EhCache缓存配置文件"><span class="post-toc-number">1.2.</span> <span class="post-toc-text">创建EhCache缓存配置文件</span></a></li><li class="post-toc-item post-toc-level-3"><a class="post-toc-link" href="#配置Shiro缓存"><span class="post-toc-number">1.3.</span> <span class="post-toc-text">配置Shiro缓存</span></a><ol class="post-toc-child"><li class="post-toc-item post-toc-level-4"><a class="post-toc-link" href="#注意事项"><span class="post-toc-number">1.3.1.</span> <span class="post-toc-text">注意事项</span></a></li></ol></li></ol></li></ol>
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<article id="post-SpringBoot中Shiro集成EhCache"
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        <h1 class="post-card-title">SpringBoot中Shiro集成EhCache</h1>
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            <time class="post-time" title="2019-08-07 12:10:32" datetime="2019-08-07T12:10:32.000Z"  itemprop="datePublished">2019-08-07</time>

            


            

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            <h2 id="学习笔记-SpringBoot项目中Shiro集成EhCache"><a href="#学习笔记-SpringBoot项目中Shiro集成EhCache" class="headerlink" title="学习笔记 : SpringBoot项目中Shiro集成EhCache"></a>学习笔记 : SpringBoot项目中Shiro集成EhCache</h2><p><em>示例程序摘自 : <a href="https://github.com/YUbuntu0109/Shiro-learning/tree/master/spring%20boot%20project%20with%20shiro" target="_blank" rel="noopener">一个简单的SpringBoot整合Shiro的权限管理案例</a></em></p>
<h3 id="添加依赖"><a href="#添加依赖" class="headerlink" title="添加依赖"></a>添加依赖</h3><p><em>Shiro-learning/spring boot project with shiro/springboot-shiro/pom.xml</em><br><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">dependencies</span>&gt;</span></span><br><span class="line">    <span class="comment">&lt;!-- Shiro --&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">dependency</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">groupId</span>&gt;</span>org.apache.shiro<span class="tag">&lt;/<span class="name">groupId</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">artifactId</span>&gt;</span>shiro-spring<span class="tag">&lt;/<span class="name">artifactId</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">version</span>&gt;</span>1.4.1<span class="tag">&lt;/<span class="name">version</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">dependency</span>&gt;</span></span><br><span class="line">    <span class="comment">&lt;!-- Ehcache --&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">dependency</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">groupId</span>&gt;</span>org.apache.shiro<span class="tag">&lt;/<span class="name">groupId</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">artifactId</span>&gt;</span>shiro-ehcache<span class="tag">&lt;/<span class="name">artifactId</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">version</span>&gt;</span>1.4.1<span class="tag">&lt;/<span class="name">version</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">dependency</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">dependencies</span>&gt;</span></span><br></pre></td></tr></table></figure></p>
<h3 id="创建EhCache缓存配置文件"><a href="#创建EhCache缓存配置文件" class="headerlink" title="创建EhCache缓存配置文件"></a>创建EhCache缓存配置文件</h3><p><em>Shiro-learning/spring boot project with shiro/springboot-shiro/src/main/resources/ehcache-shiro.xml</em><br><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">ehcache</span> <span class="attr">xmlns:xsi</span>=<span class="string">"http://www.w3.org/2001/XMLSchema-instance"</span></span></span><br><span class="line"><span class="tag">         <span class="attr">xsi:noNamespaceSchemaLocation</span>=<span class="string">"http://ehcache.org/ehcache.xsd"</span></span></span><br><span class="line"><span class="tag">         <span class="attr">updateCheck</span>=<span class="string">"false"</span></span></span><br><span class="line"><span class="tag">         <span class="attr">name</span>=<span class="string">"myEhcache"</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">diskStore</span> <span class="attr">path</span>=<span class="string">"java.io.tmpdir"</span>/&gt;</span></span><br><span class="line">    <span class="comment">&lt;!-- 授权信息缓存 --&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">cache</span> <span class="attr">name</span>=<span class="string">"authorizationCache"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">maxEntriesLocalHeap</span>=<span class="string">"2000"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">timeToIdleSeconds</span>=<span class="string">"1800"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">timeToLiveSeconds</span>=<span class="string">"1800"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">overflowToDisk</span>=<span class="string">"false"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">statistics</span>=<span class="string">"true"</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">cache</span>&gt;</span></span><br><span class="line">    <span class="comment">&lt;!-- 身份信息缓存 --&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">cache</span> <span class="attr">name</span>=<span class="string">"authenticationCache"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">maxEntriesLocalHeap</span>=<span class="string">"2000"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">timeToIdleSeconds</span>=<span class="string">"1800"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">timeToLiveSeconds</span>=<span class="string">"1800"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">overflowToDisk</span>=<span class="string">"false"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">statistics</span>=<span class="string">"true"</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">cache</span>&gt;</span></span><br><span class="line">    <span class="comment">&lt;!-- Session缓存 --&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">cache</span> <span class="attr">name</span>=<span class="string">"activeSessionCache"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">maxEntriesLocalHeap</span>=<span class="string">"2000"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">timeToIdleSeconds</span>=<span class="string">"1800"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">timeToLiveSeconds</span>=<span class="string">"1800"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">overflowToDisk</span>=<span class="string">"false"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">statistics</span>=<span class="string">"true"</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">cache</span>&gt;</span></span><br><span class="line">    <span class="comment">&lt;!-- 缓存半小时 --&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">cache</span> <span class="attr">name</span>=<span class="string">"halfHour"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">maxElementsInMemory</span>=<span class="string">"10000"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">maxElementsOnDisk</span>=<span class="string">"100000"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">timeToIdleSeconds</span>=<span class="string">"1800"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">timeToLiveSeconds</span>=<span class="string">"1800"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">overflowToDisk</span>=<span class="string">"false"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">diskPersistent</span>=<span class="string">"false"</span>/&gt;</span></span><br><span class="line">    <span class="comment">&lt;!-- 缓存一小时 --&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">cache</span> <span class="attr">name</span>=<span class="string">"hour"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">maxElementsInMemory</span>=<span class="string">"10000"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">maxElementsOnDisk</span>=<span class="string">"100000"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">timeToIdleSeconds</span>=<span class="string">"3600"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">timeToLiveSeconds</span>=<span class="string">"3600"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">overflowToDisk</span>=<span class="string">"false"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">diskPersistent</span>=<span class="string">"false"</span>/&gt;</span></span><br><span class="line">    <span class="comment">&lt;!-- 缓存一天 --&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">cache</span> <span class="attr">name</span>=<span class="string">"oneDay"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">maxElementsInMemory</span>=<span class="string">"10000"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">maxElementsOnDisk</span>=<span class="string">"100000"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">timeToIdleSeconds</span>=<span class="string">"86400"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">timeToLiveSeconds</span>=<span class="string">"86400"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">overflowToDisk</span>=<span class="string">"false"</span></span></span><br><span class="line"><span class="tag">           <span class="attr">diskPersistent</span>=<span class="string">"false"</span>/&gt;</span></span><br><span class="line"></span><br><span class="line">    <span class="comment">&lt;!--</span></span><br><span class="line"><span class="comment">         name: 缓存名称。</span></span><br><span class="line"><span class="comment">         maxElementsInMemory: 缓存最大个数</span></span><br><span class="line"><span class="comment">         eternal: 对象是否永久有效,一但设置了,timeout将不起作用</span></span><br><span class="line"><span class="comment">         timeToIdleSeconds: 设置对象在失效前的允许闲置时间(单位：秒). 仅当eternal=false对象不是永久有效时使用,可选属性,默认值是0,也就是可闲置时间无穷大</span></span><br><span class="line"><span class="comment">         timeToLiveSeconds: 设置对象在失效前允许存活时间(单位：秒). 最大时间介于创建时间和失效时间之间. 仅当eternal=false对象不是永久有效时使用,默认是0,也就是对象存活时间无穷大</span></span><br><span class="line"><span class="comment">         overflowToDisk: 当内存中对象数量达到maxElementsInMemory时,Ehcache将会对象写到磁盘中</span></span><br><span class="line"><span class="comment">         diskSpoolBufferSizeMB: 这个参数设置DiskStore(磁盘缓存)的缓存区大小,默认是30MB. 每个Cache都应该有自己的一个缓冲区</span></span><br><span class="line"><span class="comment">         maxElementsOnDisk: 硬盘最大缓存个数</span></span><br><span class="line"><span class="comment">         diskPersistent: 是否缓存虚拟机重启期数据 Whether the disk store persists between restarts of the Virtual Machine. The default value is false.</span></span><br><span class="line"><span class="comment">         diskExpiryThreadIntervalSeconds: 磁盘失效线程运行时间间隔,默认是120秒</span></span><br><span class="line"><span class="comment">         memoryStoreEvictionPolicy: 当达到maxElementsInMemory限制时,Ehcache将会根据指定的策略去清理内存. 默认策略是LRU(最近最少使用). 你可以设置为FIFO(先进先出)或是LFU(较少使用)</span></span><br><span class="line"><span class="comment">         clearOnFlush: 内存数量最大时是否清除</span></span><br><span class="line"><span class="comment">     --&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">defaultCache</span> <span class="attr">name</span>=<span class="string">"defaultCache"</span></span></span><br><span class="line"><span class="tag">                  <span class="attr">maxElementsInMemory</span>=<span class="string">"10000"</span></span></span><br><span class="line"><span class="tag">                  <span class="attr">timeToIdleSeconds</span>=<span class="string">"600"</span></span></span><br><span class="line"><span class="tag">                  <span class="attr">timeToLiveSeconds</span>=<span class="string">"600"</span></span></span><br><span class="line"><span class="tag">                  <span class="attr">overflowToDisk</span>=<span class="string">"false"</span></span></span><br><span class="line"><span class="tag">                  <span class="attr">maxElementsOnDisk</span>=<span class="string">"100000"</span></span></span><br><span class="line"><span class="tag">                  <span class="attr">diskPersistent</span>=<span class="string">"false"</span></span></span><br><span class="line"><span class="tag">                  <span class="attr">diskExpiryThreadIntervalSeconds</span>=<span class="string">"120"</span></span></span><br><span class="line"><span class="tag">                  <span class="attr">memoryStoreEvictionPolicy</span>=<span class="string">"LRU"</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">defaultCache</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">ehcache</span>&gt;</span></span><br></pre></td></tr></table></figure></p>
<h3 id="配置Shiro缓存"><a href="#配置Shiro缓存" class="headerlink" title="配置Shiro缓存"></a>配置Shiro缓存</h3><p><em>Shiro-learning/spring boot project with shiro/springboot-shiro/src/main/java/pers/huangyuhui/ss/shiro/ShiroConfig.java</em><br><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@project</span>: springboot-shiro</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@description</span>: Shiro配置信息</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@author</span>: 黄宇辉</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@date</span>: 8/5/2019-7:41 AM</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@version</span>: 1.1</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@website</span>: https://yubuntu0109.github.io/</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="meta">@Configuration</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">ShiroConfig</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@description</span>: 安全事务管理器</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@param</span>: credentialsMatcher</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@date</span>: 2019-08-05 7:53 AM</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@return</span>: org.apache.shiro.web.mgt.DefaultWebSecurityManager</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="meta">@Bean</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> SecurityManager <span class="title">securityManager</span><span class="params">(UserRealm userRealm, EhCacheManager ehCacheManager)</span> </span>&#123;</span><br><span class="line">        DefaultWebSecurityManager defaultWebSecurityManager = <span class="keyword">new</span> DefaultWebSecurityManager();</span><br><span class="line">        <span class="comment">//关联自定义realm</span></span><br><span class="line">        defaultWebSecurityManager.setRealm(userRealm);</span><br><span class="line">        <span class="comment">//关联缓存管理</span></span><br><span class="line">        defaultWebSecurityManager.setCacheManager(ehCacheManager);</span><br><span class="line">        <span class="keyword">return</span> defaultWebSecurityManager;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@description</span>: 设置缓存管理器, 缓存用户及其权限信息</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@date</span>: 2019-08-07 7:51 AM</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@return</span>: org.apache.shiro.cache.ehcache.EhCacheManager</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="meta">@Bean</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> EhCacheManager <span class="title">ehCacheManager</span><span class="params">()</span> </span>&#123;</span><br><span class="line">        <span class="comment">//注意:myEhcache对应ehcache-shiro.xml中的'&lt;ehcache name="myEhcache"&gt;'</span></span><br><span class="line">        CacheManager cacheManager = CacheManager.getCacheManager(<span class="string">"myEhcache"</span>);</span><br><span class="line">        <span class="keyword">if</span> (cacheManager == <span class="keyword">null</span>) &#123;</span><br><span class="line">            cacheManager = CacheManager.create();</span><br><span class="line">        &#125;</span><br><span class="line">        EhCacheManager ehCacheManager = <span class="keyword">new</span> EhCacheManager();</span><br><span class="line">        ehCacheManager.setCacheManager(cacheManager);</span><br><span class="line">        <span class="keyword">return</span> ehCacheManager;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">// ······</span></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure></p>
<h4 id="注意事项"><a href="#注意事项" class="headerlink" title="注意事项"></a>注意事项</h4><p><em>如果使用的EhCache版本超过了2.5.0,那么<code>&lt;ehcache name=&quot;myEhcache&quot;&gt;</code>的配置就显得非常重要了,不然EhCache会自动加载默认的名字 : <code>_default_</code>,且EhCache2.5以后只允许创建单例的CacheManager(缓存管理器),所以应注意避免重复加载CacheManager哟 : 创建ehCacheManager的时先判断是否已存在cacheManager,没有的情况下再进行创建,判断的关键为<code>ehcache-shiro.xml</code>(缓存配置文件)中配置的<code>name</code>属性,可通过该属性来判断cacheManager是否加载了,示例代码如下 :</em></p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">CacheManager cacheManager = CacheManager.getCacheManager(<span class="string">"myEhcache"</span>);</span><br><span class="line">    <span class="keyword">if</span> (cacheManager == <span class="keyword">null</span>) &#123;</span><br><span class="line">        cacheManager = CacheManager.create();</span><br><span class="line">    &#125;</span><br></pre></td></tr></table></figure>
<p><em>借鉴(非常感谢) : <a href="https://blog.csdn.net/Maslii/article/details/82380568" target="_blank" rel="noopener">https://blog.csdn.net/Maslii/article/details/82380568</a></em></p>

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